delete word should consume slash

[gurgeous]

On the mac, option-delete deletes a word. In the iOpener input panel, it should consume a slash. At the moment it does this:

~/some/directory
~/some/ (after option-delete)

but it should do this:

~/some/directory
~/some (after option-delete)

:)

[gurgeous]

Oh, and it should probably consume tilde characters (~) for good measure too.